Logic utilization of standard USRP2 configuration


#1

Hello!

I wonder how much of the FPGA on the USRP2 that is utilized.

From an earlier discussion on this list I know that the block ram usage
is
to large for the standard configuration to fit into a xc3s1500, how much
larger is it and what other resources are used?

And also: Is it expected that the configuration will grow from the
current
size?

best regards, Carl


#2

On Tue, Apr 21, 2009 at 9:17 AM, Carl Ingemarsson
removed_email_address@domain.invalid wrote:

I wonder how much of the FPGA on the USRP2 that is utilized.

We’re using about half the logic, most of the block rams, and about
half the multipliers.

From the synthesis report of the current trunk:

Device utilization summary:

Selected Device : 3s2000fg456-5

Number of Slices: 11104 out of 20480 54%
Number of Slice Flip Flops: 12657 out of 40960 30%
Number of 4 input LUTs: 20212 out of 40960 49%
Number used as logic: 18130
Number used as Shift registers: 1058
Number used as RAMs: 1024
Number of IOs: 309
Number of bonded IOBs: 301 out of 333 90%
IOB Flip Flops: 261
Number of BRAMs: 34 out of 40 85%
Number of MULT18X18s: 16 out of 40 40%
Number of GCLKs: 6 out of 8 75%
Number of DCMs: 1 out of 4 25%

And also: Is it expected that the configuration will grow from the current
size?

Yes.

Johnathan